Gary and her daughters live in Clinton, New Jersey.
Raritan is where Greg worked. Raritan is a borough in Somerset County, New Jersey.
Rochester is where Greg was supposed to have stayed the week when he went missing. Rochester is a city on the southern shore of Lake Ontario in western New York. With a population of 208,880 residents, Rochester is the seat of Monroe County and the third most populous city in New York state, after New York City and Buffalo.
San Diego in California is where Claire takes a holiday since this was one of the places where Greg stayed under false pretences. San Diego is a major city in California, United States. It is in San Diego County, on the coast of the Pacific Ocean in Southern California, approximately 190 km south of Los Angeles and immediately adjacent to the border with Mexico.
Brigantine is where Claire takes the girls for a holiday, and she gets a fright when Leah, her youngest, decides to have her own adventure. Brigantine is an island city in Atlantic County, New Jersey.
Detective Reynolds tells Claire that a car has been found on the bottom of Onondaga Lake, and the bones found there might belong to Greg. Onondaga Lake is a lake in Central New York located northwest of Syracuse, New York.
Finally, Greg is found in Toronto where he has been in a nursing home, recovering from a brain injury. Toronto, officially the City of Toronto, is the capital of the Canadian province of Ontario. It is located within the Golden Horseshoe in Southern Ontario on the northern shore of Lake Ontario. With 2,731,571 residents in 2016, it is the largest city in Canada and fourth-largest city in North America by population.